Definition of bottlenose dolphin in English:

noun

They have a pronounced bulbous melon that slopes smoothly into a long tube-like beak similar to that of a bottlenose dolphin.

Not long ago in Shark Bay, off the coast of western Australia, a female bottlenose dolphin broke a chunk of sponge off the seafloor and wore it as a mask over her snout while she probed the sediment for fish.

Nobody knows how long a sperm whale can hold its breath - or a bottlenose dolphin either, for that matter.